Allison Dukes
Senior Managing Director & Chief Financial Officer at Invesco
Thank you, Andrew, and good morning, everyone. I'll begin on Slide 4. Overall, investment performance was solid in the fourth quarter when 64% and 71% of actively managed funds in the top half of peers were beating benchmark on both a three-year and a five-year basis, respectively. Investment performance improved considerably on a five-year basis, going from 65% in the third quarter to 71% in the fourth quarter, reflective of improved performance that we're seeing across several categories, including in U.S., global and international equity. We continue to have excellent performance and fixed income across nearly all capabilities and time horizons, an important fact given our strong conviction and our ability to attract flows as investors deploy money into these strategies.
Turning to Slide 5, AUM was nearly $1.6 trillion at the end of the fourth quarter, $100 billion higher than last quarter end. The fourth quarter began with weak markets in October and then recovered as the quarter progressed, ending the year with equity and fixed income markets higher versus the third quarter. Higher markets, coupled with net long-term inflows and favorable foreign exchange movements drove the increase in assets under management during the fourth quarter.
We generated $6.7 billion in net long-term inflows, which was an organic growth rate of 2.4% that we expect will once again outperform peers in what has been a challenging environment for organic asset growth. Looking at flows by investment approach, client demand for passive capabilities remained strong as we garnered nearly -- excuse me, nearly $14 billion of net long-term inflows during the quarter. ETF inflows were $12.4 billion, an annualized organic growth rate of 17%, marking this as one of our best quarters for ETFs.
The S&P 500 Equal Weight Index fund once again led the quarter with $4.6 billion of net long-term inflows. This ETF was also our leading flow driver for the year with nearly $13 billion of inflows. Our QQQM ETF drew the second highest inflows in our ETF suite with over $2 billion for the quarter. The QQQM was launched a little over three years ago and now stands at over $18 billion of AUM, making it our third largest ETF outside the QQQ.
We've demonstrated the ability to sustain growth in ETFs throughout the full market cycle, with organic growth in 13 quarters of the past 14 quarters. Offsetting some of the growth in passive, was $7.2 billion of net outflows in active strategies. What's encouraging is that the level of outflows in the fourth quarter was the second lowest since the market sell-off began in early 2022. The lower level of net outflows was driven by growth in active fixed income products, led by our custom fixed income SMA, which totaled $2.1 billion in inflows.
Regarding active equity strategies, we experienced another quarter of strong growth in Japan with our Henley global equity and income fund garnering $1.4 billion of net inflows from Japanese clients. This fund continues to be the top selling retail fund for the industry in Japan on both a quarterly and a year-to-date basis. Active global equity products experienced net outflows of $1.6 billion, of which $1.2 billion came from the developing markets fund. The level of outflows from this investment class has declined after significantly elevated redemptions in the second half of 2022.
Looking at flows by channel, the retail channel generated $4.6 billion of net long-term inflows, while our institutional channel had net inflows of $2.1 billion. Driving the growth in the retail channel were the ETF products I noted previously, as well as the custom fixed income SMA. Growth in the institutional channel resumed after net long-term outflows in the third quarter that were driven by the global targeted returns redemptions.
Moving to Slide 6 and flows by geography, Asia Pacific delivered net long-term inflows of $5.8 billion, representing organic growth of 12%, driven by growth in Japan and a resumption of growth in our China joint venture. Japan's net long-term inflows were $3 billion in the fourth quarter, representing an organic growth rate of 21% and driven by the Henley global equity and income fund as well as fixed income products. We believe Japanese markets are seeing the most constructive conditions for risk on assets in many years, and we're well positioned to capture that growth. Our China joint venture generated $1.7 billion in net long-term inflows driven by ETFs and fixed income strategies.
Turning to flows by asset class. Equities generated $8.3 billion in net long-term inflows, mainly driven by the strong growth in ETFs. Fixed income flows were impacted by our planned bullet share ETF maturities that occur each December, which totaled $2.8 billion. This is an annual occurrence, and these outflows are typically offset by new bullet share products launched in the first quarter, where we are already seeing strong inflows in January. Excluding these maturities, fixed income and net long-term inflows were $2.9 billion.
In alternatives, we generated $1 billion of net long-term inflows in bank loans, including CLOs, and $400 million of net long-term inflows into direct real estate. These inflows were offset by outflows and other products that we classify as alternative products, such as global asset allocation and commodity ETFs. We have a strong track record in our private markets platform with alternatives and are well-positioned to capture long-term flows in this asset class as client demand shifts to these strategies.
Moving to Slide 7, secular shifts in client demand across the asset management industry, coupled with more recent market dynamics, have significantly changed our asset mix since the acquisition of OppenheimerFunds. Going back to 2019, after the acquisition, ETFs and index AUM, excluding the QQQ, have grown from $171 billion, or 14% of our overall $1.2 trillion in average AUM in 2019, to $362 billion, or 22% of our average AUM of $1.5 trillion in the fourth quarter.
The QQQ, a product we earn no management fees from but does provide a substantial marketing benefit, has tripled in size over this time, going from $74 billion to $230 billion, or from 6% to 14% of total average AUM. We've also seen very strong growth in global liquidity, going from $82 billion, or 7% of average AUM, to $170 billion, or 12% of average AUM in the fourth quarter. These product -- these product areas carry lower net revenue yields compared to our overall net revenue yield.
During the same time frame, we've seen weaker demand for fundamental equities and multi-asset products, which carry higher net revenue. This has been driven in part by the risk off sentiment that was sparked in early 2022, coupled with the pressure that we experienced in developing markets and global equities, as well as the closure of our GTR capabilities. Our fundamental equity portfolio in 2019 was $348 billion or 29% of our average AUM. By the fourth quarter, that portfolio had declined to $261 billion, or 16% of our average AUM. Multi-asset also declined from 7% to 3% of the average AUM over this time frame.
Looking at the fourth quarter as compared to the third quarter of 2023, we continued to experience similar dynamics with ETFs going from 21% to 22% and the QQQ going from 13% to 14% of average AUM, while fundamental equities declined from 17% to 16% and multi-asset from 4% to 3% of average AUM in the quarter.
The resultant revenue headwinds created by these dynamics has weighed on our results over the last four plus years. While we've experienced excellent organic growth and lower fee capabilities like ETFs and global liquidity, it was not enough to offset the revenue loss from higher fee fundamental equity and multi-asset outflows. Our overall net revenue yield has declined meaningfully during this time frame, but that decrease has been driven by the shift in our asset mix, not degradation in the yields in our investment strategies. Net revenue yields by investment strategy have been relatively stable within the ranges provided on this slide.
The other point that I want to emphasize is that this multi-year secular shift in client preferences has been increasingly captured in our results. Our portfolio is better diversified today than four years ago, and our concentration risk in higher fee fundamental equities and multi-asset products has been reduced. These dynamics, though challenging to manage through as they occur, should pretend well for future revenue growth and marginal profitability improvement independent of market gains. Further, we now have a more diversified business mix which better positions the firm to navigate various market cycles, events and shifting client demand.
Turning to Slide 8, net revenue of $1.05 billion in the fourth quarter was $62 million lower than the fourth quarter of 2022 and $52 million lower than the third quarter of 2023. The decline from last year was due largely to a $35 million decline in performance fees and the shift in our asset mix that was just discussed. The decline in performance fees was mainly driven by lower fees generated from real estate related and other private markets activities. The decline from the prior quarter was primarily due to incremental asset mix shift and lower average assets under management partially offset by higher performance fees in the quarter.
Total adjusted operating expenses in the fourth quarter were $771 million, relatively unchanged from the fourth quarter of last year. Included in fourth quarter 2023 are $22 million related to organizational change expenses and $12 million of Alpha platform related implementation expenses. Adjusting for these items, fourth quarter expenses were $32 million lower than the fourth quarter of 2022.
Total adjusted operating expenses were $18 million lower than the third quarter. More specifically, looking at employee compensation that has been impacted by the organizational change expenses, compensation was $26 million lower in the fourth quarter, which includes $11 million in expense savings related to the organizational changes that I'll provide more detail on shortly.
Marketing expenses of $28 million were $6 million lower than the fourth quarter of 2022. As we continue to tightly manage discretionary spend, given the ongoing challenging revenue environment. Property, office and technology expenses were flat to last year and $4 million higher than last quarter.
G&A was $19 million higher than last quarter as we typically see higher G&A in the fourth quarter. We also had $12 million in spending related to our Alpha platform implementation higher than the $8 million incurred in the third quarter due to incremental implementation costs in the fourth quarter.
Going forward, we expect one-time implementation cost to be approximately $10 million per quarter in 2024 with some fluctuation quarter-to-quarter. We will continue to update our progress on the implementation and related costs as we move forward.
Now moving to Slide 9, we realized $11 million in expense savings in the fourth quarter related to the organizational changes. On an annualized basis, we have achieved $44 million, or nearly 90% of the $50 million in expense savings we expect to realize in 2024. We expect to realize the remaining $6 million in the first quarter. We're not expecting any further significant restructuring costs associated with these efforts. The full benefits from our simplification efforts will be seen over time as we generate revenue growth and margin recovery.
As we've discussed, we manage variable compensation to a full year outcome in line with company performance and competitive industry practices. Historically, our compensation to net revenue ratio has been in the 38% to 42% range, trending towards the upper end of the range in periods of revenue decline. At current AUM levels, we would expect the ratio to be at or slightly above the higher end of this range for 2024. Seasonally, we see approximately $25 million in higher compensation expenses related to payroll tax and other benefit recess [Phonetic] in the first quarter. And as a result, we would expect the ratio will exceed 42% during the first half of 2024.
Moving to Slide 10, adjusted operating income was $275 million in the fourth quarter, which included the costs related to organizational changes. Adjusted operating margin was 26.3% for the fourth quarter. Excluding the costs related to organizational changes, fourth quarter operating margin would have been 210 basis points higher. Earnings per share was $0.47 in the fourth quarter. Excluding the costs related to organizational changes, fourth quarter earnings per share would have been $0.04 higher.
Effective tax rate decreased to 9.9% in the fourth quarter from 23.6% last quarter. The decrease was primarily due to a discrete tax benefit related to the resolution of certain tax matters, favorable tax treatment related to a gain on sale of certain Hong Kong pension sponsorship rights, and the favorable impact of a change in mix of income across tax jurisdictions. We estimate our non-GAAP effective tax rate to be between 23% and 25% for the first quarter of 2024. The actual effective rate can vary due to the impact of non-recurring items on pre-tax income and discrete tax items.
I'll conclude on Slide 11. The stated priority for us is building balance sheet strength. This quarter our cash balance was $1.5 billion and we ended the year with nothing drawn on our credit facility. We have lowered our net debt significantly and it now stands near zero. We have a $600 million senior note maturing on January 30th and we are in position to redeem the note at maturity. We estimate we'll have approximately $500 million in excess cash and we'll draw approximately $100 million on our credit facility to fully redeem the note.
The first quarter is a seasonally high cash usage quarter, so we do expect to have a balance on the credit facility at quarter end, which will pay down as we move through the second and third quarters and reach our goal of zero net debt. We also hope to begin a more regular stock buyback program as we move towards this goal.
To conclude, the resiliency of our firm's net flow performance in a difficult market for organic growth is evident again this quarter, and we're pleased with the progress we're making to simplify the organization and build a stronger balance sheet while continuing to invest in key capability areas. We're committed to driving profitable growth and a high level of financial performance, and we have the right strategic positioning to do so.
And with that, I'll ask the operator to open up the line for Q&A.